Basic info to know about your supplemental tax bill

by Marianna E Perez 04/27/2025

A supplemental tax bill is separate from your annual tax bill and may arrive at any time. But what exactly is a supplemental tax bill, and why do property owners pay them? Here is a guide to the key information to know about supplemental property taxes and the associated bills:

Supplemental assessments

A supplemental assessment is a change in a property's value. Supplemental assessments usually occur when there are major upgrades made to a property, like new construction, rehabilitation or expansion. However, supplemental assessments also happen when a property changes owners. In some cases, supplemental assessments can be lower than the previous assessment, resulting in a refund.

Multiple tax bills

Supplemental tax bills are separate from your regular property tax bills. Therefore, they may post at a different time and be due at a different time. It's important to note the deadlines carefully to avoid late fees and other penalties.

Appealing a supplemental assessment

Sometimes, property owners want to appeal a supplemental assessment on their home. Regardless of whether the assessment is higher or lower than expected, the owner can contact their local tax assessor's office to file an appeal. Details vary by municipality, but it's common for an appeal to be due within 60 days of the supplemental assessment for it to be considered.

Supplemental tax bills might seem like an unexpected expense. Therefore, it's important for property owners to familiarize themselves with how they work. Keep these basics in mind and you'll be ready for whatever comes next.

About the Author
Author

Marianna E Perez

Marianna E. Perez is a Real Estate professional with over 20 years of experience. A lifelong resident of South Florida, she keeps her finger on the pulse of the latest trends and movements in the real estate market. She offers clients top-notch guidance from start to finish, ensuring the entire process is seamless, efficient and rewarding. Prior to entering real estate, Marianna was Senior Vice President of Commercial Real Estate Banking at City National Bank of Florida. She provided strategic leadership facilitating profitable and efficient origination of real estate loans. Marianna was a trusted advisor to clients and to the bank growing a real estate portfolio to over $300 million. She is firmly committed to the philosophy “not quantity, but quality,” which she practices in both her personal and professional life. Marianna is a graduate of FIU where she earned a bachelor’s degree in business management. She is a member of the Miami Association of Realtors, a lifetime board member of the BASF (Builders Association of South Florida), a member of CREW (Commercial Real Estate Women), and ICSC (International Council of Shopping Centers). She is also involved with the Women’s Leadership Council (United Way TNC). In addition, Marianna has received these special industry accolades: Housing Hall of Fame inductee 2017 Builders Association of South Florida, Associate of the Year 2017 Builders Association of South Florida, Florida’s Best Awards Chair 2016 and 2004 Builders Association of South Florida, Vice President 2008 Builders Association of South Florida, President’s Award 2008 and 2003